A few years ago I found some excellent propagators, only by chance, and never really looked back.
They’re ideal for starting a controlled number of seedlings – that was very important for me because I would grow so many that a huge plot of land wouldn’t be enough!
Another great feature is that it takes away the worry, in case I go away for a day or two, that the seedlings might dry out. They don’t! They’re actually designed for people who might have to be away for a while and the tray keeps the seedling watered.
They’re very easy to put together and with careful handling last for years – I’ve had mine for about three years already.
I always wash them when finished with the seedlings, store them and start again next spring.